Taylor Swift or Tony Stark? Robert Downey Jr. Welcomes Tom Hiddleston to Instagram – by Poking Fun at Him

Downey Jr., 51, welcomed his Avengers costar to Instagram on Monday by poking fun at Hiddleston’s relationship with Taylor Swift. The actor took to his own Instagram account to post the infamous picture of Hiddleston wearing his “I [Heart] T.S.” shirt.

“Join me in welcoming the biggest T. Stark fan of them all to Instagram!” he captioned the comical shot.